Albert Einstein
(1879 - 1955): In the year 1905, Einstein elaborated on the
experimental results of Max Planck who noticed that electromagnetic
energy seemed to be emitted from radiating objects in quantities
that were discrete. The energy of these emitted quantities- the
so-called light-quanta- was directly proportional to the frequency
of the radiation which was completely contrary to classical
electromagnetic theory, based on Maxwell's equations and the laws of
thermodynamics. Einstein used Planck's quantum hypothesis to
describe visible electromagnetic radiation, or light. According to
Einstein's viewpoint, light could be imagined to consist of discrete
bundles of radiation.

Albert Einstein

Video : Albert Einstein Biography

Einstein used this interpretation to explain the photoelectric
effect, by which certain metals emit electrons when illuminated by
light with a given frequency. Einstein's theory, and his subsequent
elaboration of it, formed the basis for much of Quantum Mechanics.

Read more on history,
origin and development of electronics and technology and some great
inventions and contribution of some of the greatest scientists and
inventors of all times.

James Clerk Maxwell
(1831 - 1879) wrote a mathematical
treatise formalizing the theory of fields in 1856: On
Faraday's Lines of Force. In the year 1873
Maxwell published Electricity and
Magnetism, demonstrating four partial differential equations
that completely described electrical phenomena. Read More onInventions and
Contribution of James Clerk Maxwell
to
Electronics

Thomas Alva Edison
(1847 - 1931): In 1878, Edison began work
on an electric lamp and sought a material that could be electrically
heated to incandescence in a vacuum. 1882
Edison installed the first large central power station on Pearl
Street in New York City in 1882; its steam-driven generators of 900
horsepower provided enough power for 7,200 lamps. Read More onInventions and
Contribution of Thomas Alva Edison
to Electronics